Machine for notching lids or covers for tubs or buckets.



. P. ARLT. MACHINE FOR NOTGHING LIDS 011 COVERS FOB TUBS 0R BUGKETS.

APPLICATION FILLED AUG. 25, 1910.

989,753. r I Patented Apr. 18, 1911.

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F. ARLT. MACHINE FOR NOTOHING LIDS 0R COVERS FOR TUBS 0R BUGKETS.

APPLICATION FILED AUG. 25, 1910.

Patented Apr. 18, 1911.

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UNITED STATES PATENT onricn.

FRANZ ARLT, OF LU'BECK, GERMANY.

MACHINE FOR NOTCHING LIDS OR COVERS FOR TUBS 0R BUGKETS.

Specification of Letters Patent.

Application filed August 25, 1910. Serial No. 578,859.

To all whom it may concern:

Be it known that I, FRANZ ARI/1, subject of the Emperor of Germany,residing at Parade No. 8, in Liibeck, Germany, have invented certain newand useful Improvements in Machines for Notching Lids or Covers for Tubsor Buckets, &c., of which the following is a specification, referencebeing had therein to the accompanying drawings.

My invention relates to machines for notching lids or covers for tubs orbuckets etc, has for its object economy in time and labor, and theinvention consists in certain improvements in construction which will befully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification,Figure 1 represents a side elevation of a machine embodying myinvention, Fig. 2 is a front elevation of the same, Figs. 3 and 4 areplan.

views, Fig. 5 is an enlarged detail of the guiding mechanism for thecover to be operated upon, and Fig. 6 is a plan view of a cover on areduced scale.

Reference being had to the drawings and the designating charactersthereon, the letter a indicates columns which are connected by a plateI), and on the columns are plates (Z and which are provided withopenings cl corresponding with the notches to be cut in the covers. Theplates (Z and f are slidably mounted on the columns a by means ofcollars c and 6 respectively.

The columns a are provided with vertical grooves a into which hooks 0'connected to the collars c protrude to arrest the upward movement of theplate (Z. The plate f is connected to the plate 9 by means of a springactuated bolt 9. In front of the openings (1 in the plates (Z and f, onthe shafts 71/ and 71; respectively, two circular saws z' and z" aremounted. On the baseplate Z is a carriage a, which can rotate around itscentral axis m, and carries two bow saws 0, 0.

By the rotation of the pulley 3 through the belt 6 and the pulley 7 uponthe shaft h, the circular saws 2' are put in motion and at the sametime, by means of the pulleys 8 and 9 and the bolt 10 the circular sawsz" are actuated.

The motion of the pulley 4 is transmitted through the belt 11 to thepulley 13 which is fixed to the crank shaft 12, whereby, by

means of the thrust shaft 79 which is connected at one end with thecrank shaft 12 and at the other with the carriage n, the carriage 11receives its short oscillatory movement around its axis. The pulley 5communicates in the proper manner with the crank shaft 1 1 which latterimparts through its movement and by means of the rod 15 an oscillatorymovement to the crank 16. The crank 16 is attached to the shaft 17, towhich also is keyed the gear-wheel 18 which engages the rack q fastenedto the plate f and protruding through the cover 6 by which the plates fand (Z are moved up and down.

The operation of the machine is as fol lows: \Vhile the plate (Z is heldby the hooks c at a certain height on the columns a, the plate f ismoved by the spring g toward the plate I) (Fig. 5). The round cover orlid t to be cut, is now inserted between the two plates. By means of thebefore described mechanism, plate f is pressed firmly against the covert resting on the plate d (Fig. 1) and moves in connection with the samedownward to the rotating circular saws 2' and 2', whereby the cover ifis provided with the transverse cuts 1. In moving farther downward thecover t encounters the suitably bent saws 0, 0 of the carriage a whichis put in short oscillatory movements by the crank shaft 12 and thethrust shaft p and makes the are like cut .9. After which the plateswith the cover move upward and the now ready-cut cover is removed and anew one inserted and the operation repeated.

A partial revolution of the gear 18 serves to move the plates the entiredepth of the machine.

The wear on the saws by repeated sharpening of the same can be adjustedby the bolts o, o, slidable in slots of the frame a, u, and by movingthe bow saws upward which can be performed by loosening the screws to,w.

The machine is driven by a suitable motor, not shown, connected to apulley keyed to the shaft 2, and the rotation of said shaft istransmitted to the pulleys 3, 1 and 5.

Having thus fully described my invention, what I claim is:

1. In a machine for notching lids or covers, columns, plates supportedthereby, spring-actuated bolts connecting said plates for supporting thecover or lid to be notched, circular saws for making transverseincisions in said cover or lid, and bow saws Patented Apr. 18, 1911.

plates and acting on the upper plate, one of said lates supporting thecover to be operate upon.

3. In a machine for notching lids or covers, columns provided withvertical grooves, plates movable thereon, means for moving the lowerplate upward, hooks engaged in said grooves for limiting the upwardmovement of the lower plate, a spring-actuated member connecting theupper and lower plates and acting on the upper plate, one of 20 saidplates supporting the cover to be operated upon, means for makingtransverse incisions in the cover, and means for making arc-shapedincisions therein.

In testimony whereof I affix my signature 25 in the presence of twowitnesses.

a FRANZ ARLT.

Witnesses:

J OHN ALFE, JAs. VVULP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

